Improvement in door-springs



'and made use of for 'the purpose in question, and I `figs. .7 and l0, to receive a movable pin, g, which, being cano ggg ga.. /taten @niet WILL-IAM Ross, 0F BALTIMORE, MARYLAND.

i Leners Patent No. 88,985, me@ Apen 13, 1869.

IMPRVEMENT IN DOOR-SPRINGS.

The Schedule referred to in these Letters Patent and making part of the same.- I

To all whom 'it may concern:

Be known that I, WILLlAM Ross, of the city and county of Baltimore, inthe State of Maryland, have invented a new and useful Improvement in Door4v Springs; .and I do hereby declare the following to 'be a full, clear, and exact description 'of the saine,'refer ence being had to the accompanying drawings, which are made a part ofthis specification, and in which- Figure l is a side elevation of a door with my iinproved spring applied. i

Figures 2 to 1l, inclusive, are views of the parts in detail.

Similar letters denote the same parts in the differ-A ent igures.

This invention relates to the upright-rod spring, whose resilience and consequent capability of closing the door are due to the torsion to which it is subjected by the opening ofthe door.

I am'aware that the rod-spring hasbeen long known am likewise acquainted with the construction of and mode of applying different devices for attaching thespring, and regulating the resilient power of the same, such devices lhaving .beenmade the subject-matter ot several patents.

My invention 'has for its object the production of appliances forattaching and regulating the power of the spring, which shall be at once more effective, more easily manufactured, and applied in use, simpler, and less liable to derange'ment than those heretofore employed.

In order that others skilled in the art 'to which my invention appertains, may be enabled tofully under-- stand and use the same, I will proceed to describe it in connection with-the drawings.

In iig. l, A represents an upright torsional rodspring, of steel, which is preferably triangular, in trans verse section, at both ends.

At top, the spring A is attached to the door B, by means ot'a plate, C, which has a triangular socket, c, Iig. 3, into which the corresponding end of the rod A is inserted, as shown in iig. 2.

'lhe plate G is screwed fast to the door B.

The spring H cannot turn within the socket c.

Thelower-end ot' theV spring A is inserted into a co1:- respondingly triangular or trigonal socket (l, iig. 10, which extends axially through the notched wheel D, and ,partially through .the stein or shank D.

The wheel D and the stem D are'cast together, 'and the stein D has a round port-ion, and a square, or angular portion, the lround part being lit-ted ina corresponding socket, e, in the plate E, which is screwed rast to the door-frame B', andthe angular part protruding below' said socket, as shown in fig. 6, to admit of the application t o said stem of a wrench, iig. l1, for 'a purpose to be explained.

The socket-plate E is provided with an aperture, e,

made to occupy one of the'notchesv in the periphery of wheel D,- ivill lock the wheel D in the desired .po-

sition to which it may be turned.'

vThe pin g is a separate unattached part; it is pro-v vided at .one end with a loop, (see-g. 8,) which lits over the lower end of the rod-spring A, and rests upon the wheel D, it being thus supported and retained in 'its locking position, as shown'in iig. 6.

The spring A is held and prevented from bowing .out at thecentre by means of the socket-plate F, tigs. 4 and 5, which is screwed fast to the door-frame,

and in which the spring A is free to turn.

It is to` be particularly noticed that the lower end of the spring A does not protrude below the socket-plate E; that the 'lower 4end of the spring A occupying the socket in the wheel D, and its stem D', serves to hold the'wheel 'in proper position upon. the socket-plate E, by preventing the upward movement or displacement of said wheel; and that in consequence of this constructionl of the appliances, a double-jawed socketplate, to hold the wheel D in position, is dispensed with.

In operation, while the lower end of the spring A is held against turning, by the devices D D' E g, the upper end of the 'spring is turned, when the door is opened, vby reason of its attachment to the same;

hence .the spring is twisted tosuch an extent that' when the Vdoor is released, the resilient spring restores it to its closed position.

To set the spring so as to increase `or diminish its resilient power, the pin. g is withdrawn, the wrench, iig. 11, is applied to the stem D', and the latter, together with the Wheel D and 'springA, being turned, till said Aspring Yhas the desired degree of torsion, the

power of the .pin gis reinserted, and the spring thus retained in the position to Which-it was'turued by the wrench.

The vwheel D, as heretofore made, has rectangular notches between the peripheral teeth, or projections, by reason of which the teeth are easily and frequently broken Voff by the pressure they'have to endure.

The wheel thus made is thereby ive, and has to be replaced.

To obviate this breaking oil of' the teeth, I give to the notches, in the process of casting vthe wheel, the circular .form shownat d, tig. l, whereby-I obtain a broad base Yfor the teeth or projections,and render them less liable to break oil'. v

Having thus described my invention,

What I claim. as new herein, Aand desire Letters Patent, is

'lhe ,notched wheel D, and two-part stern D', cast together, in combination with the ping, socket-plate E, and spring A, said stern having a rounded part for entering'the socket-plate, and an angular part prof truding therethrough, all'as and for the purpose de- 'To the above'speeiiicatio'n of my improvementin door-springs, I have signed my hand, this 5th day of to secure by 

